51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
// this file is based on clangversionabstraction.h from https://github.com/woboq/moc-ng
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#ifndef REFLECTIVE_RAPIDJSON_CLANG_VERSION_ABSTRACTION_H
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#define REFLECTIVE_RAPIDJSON_CLANG_VERSION_ABSTRACTION_H
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#include <clang/Basic/SourceLocation.h>
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#include <clang/Basic/Version.h>
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#include <memory>
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namespace ReflectiveRapidJSON {
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/*!
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* \brief The MaybeUnique class represents either a std::unique_ptr or a raw pointer.
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* \remarks This is used to support Clang < 3.6 which has not been using unique_ptr in many places yet.
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*/
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template <typename T> struct MaybeUnique {
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T *val;
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operator T *()
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{
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return val;
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}
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template <typename X> operator std::unique_ptr<X>() &&
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{
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return std::unique_ptr<X>(val);
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}
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};
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template <typename T> MaybeUnique<T> maybe_unique(T *val)
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{
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return { val };
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}
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template <typename T> MaybeUnique<T> maybe_unique(std::unique_ptr<T> val)
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{
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return { val.release() };
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}
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/*!
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* \def REFLECTIVE_RAPIDJSON_MAYBE_UNIQUE
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* \brief The REFLECTIVE_RAPIDJSON_MAYBE_UNIQUE macro either expands to a std::unique_ptr or a raw pointer depending on the Clang version.
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*/
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#if CLANG_VERSION_MAJOR == 3 && CLANG_VERSION_MINOR <= 5
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#define REFLECTIVE_RAPIDJSON_MAYBE_UNIQUE(t) t *
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#else
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#define REFLECTIVE_RAPIDJSON_MAYBE_UNIQUE(t) std::unique_ptr<t>
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#endif
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} // namespace ReflectiveRapidJSON
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#endif // REFLECTIVE_RAPIDJSON_CLANG_VERSION_ABSTRACTION_H
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